drop the ball

Từ điển WordNet v3.1 - WordNet Dictionary

verb

commit a faux pas or a fault or make a serious mistake
- I blundered during the job interview
• Syn:
sin, blunder, boob, goof
• Derivationally related forms:
goof (for: goof), boob (for: boob), blunderer (for: blunder), blunder (for: blunder)
• Hypernyms:
transgress, offend, infract, violate, go against,
breach, break
• Verb Frames:
- Somebody ----s
- Somebody ----s PP
- Somebody ----s something (for: blunder)